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10-05-2019
Mathematics

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Maria drives to school in 20 minutes. She drives home in 24 minutes. What was her average driving speed in terms of d, the distance from her home to school?

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10-05-2019

Speed is distance/time so

[(d/20)+(d/24)]/2= 24d+20d/24•20•2=44d/20•24•2=22d/20•24=11d/240

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